20111012012120 has 16 divisors (see below), whose sum is σ = 45249777027360. Its totient is φ = 8044404804832.

The previous prime is 20111012012023. The next prime is 20111012012159. The reversal of 20111012012120 is 2121021011102.

It is a junction number, because it is equal to n+sod(n) for n = 20111012012095 and 20111012012104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251387650112 + ... + 251387650191.

It is an arithmetic number, because the mean of its divisors is an integer number (2828111064210).

Almost surely, 2^{20111012012120} is an apocalyptic number.

20111012012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111012012120 is an abundant number, since it is smaller than the sum of its proper divisors (25138765015240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111012012120 is a wasteful number, since it uses less digits than its factorization.

20111012012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502775300314 (or 502775300310 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20111012012120 its reverse (2121021011102), we get a palindrome (22232033023222).

The spelling of 20111012012120 in words is "twenty trillion, one hundred eleven billion, twelve million, twelve thousand, one hundred twenty".